Wondering if the heater & ac controls have dash lights behind them. They can be hard to see at night - mine don't have any lights working behind them. The A/C button, Recir Button & Vent selection buttons light green when in use but what about the panel itself. If it does have lights don't know if it's just a fuse or something else as an aftermarket radio has been installed. Any help appreciated.

 

There are a couple of light bulbs behind the panel that are supposed to light up and brighten or dim with the dash lights. If the lights on the dash work, most likely the panel bulbs are burnt out.

 

Does anybody know the type of the bulb it takes for behind the fan and heat controls? I'll probably take them out to check but I'm guessing either a 74 or a 168.